The sentinel event investigation has also led to Northland PHOs offering on-going professional development for all general practitioners which would include improved documentation, follow-up planning and management in the after-hours setting.
Northland Primary Healthcare clinical director Kyle Eggleton, who led the investigation, said meningococcal disease was unpredictable, moved rapidly and its presentation was variable.
His inquiry found the after-hours duty doctor did not make mistakes in his initial treatment for gastroenteritis and an ear infection.
The child was discharged but died at home a few hours later.
"There is no real criticism of the doctor's treatment of the case," Dr Eggleton said.
Another doctor might also have missed the likelihood the illness could lead to strain-B bacterial meningococcal disease and, subsequently, death, he said.
"Making the correct diagnosis of meningococcal septicaemia is difficult especially in early presentations."
However, after meeting with the child's parents on October 25, Dr Eggleton came to the conclusion the GP had not ensured the child's father fully understood the advice given or the observation instructions.